According to german TV Station N-TV, there are now four fatalities, including two in a neighbouring building that was rocked by an explosion before the shooter ran out of the building and into the hospital. One Policeman is in critical condition according to the report.

Link (German, apart from BBC, no other english news outlet seems to have picked up the story):

I can't believe this happened in Loerrach! My grandparents lived there after leaving the divided Berlin in the '60s. In fact, my grandmother was treated in this very hospital on several occasions! Very strange to see Loerrach, a town where nothing ever happens, on the news!

"I object to violence because when it appears to do good, the good is temporary; the evil it does is permanent" - Ghandi